His current research interests include image and video analysis, machine learning, etc. He has authored or co-authored more than 40 academic papers in these areas. He served as Technical Program Committee member for some international conferences, such as ACM Multimedia 2009 (content), IEEE Conference on Computer Vision and Pattern Recognition (CVPR’08), IEEE International Conference on Multimedia and Expo (ICME’08), Pacific-Rim Conference on Multimedia (PCM’08), IEEE International Conference on Computer Vision (ICCV’07), etc. He has also co-organized several special sessions on ICME 2009, PCM 2008, and became guest editor of Pattern Recognition Journal.